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A conserved behavioral role for a nematode interneuron neuropeptide receptor
Cynthia M Chai1, Wen Chen1, Wan-Rong Wong1
1Division of Biology and Biological Engineering, California Institute of Technology, Pasadena, CA 91125, USA.
Genetics
|November 6, 2021
Summary
Researchers identified six neuropeptide receptors in C. elegans that control escape behaviors. The FRPR-14 receptor
Area of Science:
- Neuroscience
- Behavioral Biology
- Genetics
Background:
- Neuropeptides regulate diverse physiological and behavioral processes in animals.
- Understanding neuropeptide function requires systematic analysis of neuropeptides and their receptors.
- Limited availability of genetic tools has hindered research in model organisms like C. elegans.
Purpose of the Study:
- To systematically analyze neuropeptide G-protein coupled receptors (GPCRs) in C. elegans.
- To identify novel GPCRs involved in the touch-evoked escape response.
- To investigate the role of specific receptors, like FRPR-14, in modulating distinct behaviors.
Main Methods:
- Generation and screening of 21 C. elegans neuropeptide GPCR mutants.
- Behavioral assays, including the touch-evoked escape response.
- Comparative analysis using Caenorhabditis briggsae.
Main Results:
- Six neuropeptide GPCRs were implicated in the touch-evoked escape response.
- The frpr-14 mutant exhibited severe defects across multiple behavioral paradigms.
- FRPR-14 signaling in different interneuron classes (AVH, AIB) drives distinct behavioral outputs.
- C. briggsae CBR-FRPR-14 modulates similar behaviors, suggesting conserved function.
- Interspecific variation in behavior may arise from altered receptor expression patterns.
Conclusions:
- Neuropeptide GPCRs play crucial roles in complex behaviors.
- Cellular context determines the behavioral output of neuropeptide signaling.
- Evolutionary divergence in neuropeptide receptor expression contributes to behavioral differences between species.
- This study provides a framework for understanding neuropeptidergic control of behavior.
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